128585649 has 8 divisors (see below), whose sum is σ = 171561280. Its totient is φ = 85666896.

The previous prime is 128585629. The next prime is 128585657. The reversal of 128585649 is 946585821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128585649 - 2⁸ = 128585393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128585598 and 128585607.

It is not an unprimeable number, because it can be changed into a prime (128585629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8629 + ... + 18210.

It is an arithmetic number, because the mean of its divisors is an integer number (21445160).

Almost surely, 2^128585649 is an apocalyptic number.

It is an amenable number.

128585649 is a deficient number, since it is larger than the sum of its proper divisors (42975631).

128585649 is a wasteful number, since it uses less digits than its factorization.

128585649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28439.

The product of its digits is 691200, while the sum is 48.

The square root of 128585649 is about 11339.5612348979. The cubic root of 128585649 is about 504.7358668398.

The spelling of 128585649 in words is "one hundred twenty-eight million, five hundred eighty-five thousand, six hundred forty-nine".